Lifting device.



s. E. cowuzs. I

LIFTING DEVICE.

APPUCATION FILED SEPT. I1. 1915.

1,203,586. Patented Nov. 7, 1916.

2 SHEETS-SHEET l- )N VENTOR.

ATTORNEYS. V

S. E: COWLES.

LIFTING DEVICE.

APPLICATION FILED SEPT. 11, .1915.

123,5, Patented Nov. 7, 1916.

2 SHEETS-SHEET 2.

' Fig.

SAMUEL E.

Specification of Letters atentL am a Nov. a, 1916.

Application fileiSeptember 11, was. Serial No. 50,159.

To'aZZ whom it may concern Be it known that l, SAMUELI. Cow's-es, a citizen-of the United States of Americfi', and residing at /i oronoco, in the county of Hampden and State of Massachusetts, have invented certain new and useful liniprovements in. Lifting Devices, of which the following is a. specification. This invention relates to a device for litting rolls ofpaper or other heavy units and particularly to the means for binding the lifting. mechanism to the load.

'lhed-nvention is characterized by a pair of expansihle andcontraetihle jaws both of which are iivoted on a connecting lever independently ormrahle hy the n'iovement ot the latter to be expanded and contracted to and from holding pos on for the load.

The objects oft-he invention will appear 'inore particularly in the following detailed description oi one preterred. term and the annexed claims which point out the scope of the invention. v

The preferred embodiment of the invention is sho'r n. in a mechanism "for lifting rolls of paper by en 'i'agcmcnt with the core on which he paper is wound.

In "the drawings--Fignre lf an tional view, partly in section, showing the application of the invention in lifting a is a sectional elevation alciv tion in a. tubular co ig. 3 a vie" similar to Fig. 2 but lg the core hr e expanded position; Fig. is a. sectional view taken on and the line 41- 1- of 1 looking in the direction of arr. I

is a erosssoctional view taken on the line 13-5 of 3 and looking in the direction of the arrows.

Refer to the drawings and particn larly to A 1: 0; represents a of paper wound upon a, tubular core 7) a .:h latter is arranged to he connected hy the core lifters to hoisting devices. 'iie latter are shown in conventional form only and comp-rise a snitahle crane which is provided with suitahle/liiting devices not shown. A hoisting chain (Z for crane has secured thereto at the point e pair of short chains f which are provided with hooks their lower core lifters as indicated in l The core lif er itself is best shown 2 to 5 to which particular d-e. iever arm i... for

and

arms '1, the harder are the eye at its upper end to receive one of the chains f is bent at its lower end, as shown in Figs. 2 and 3, and provided with opposed segmental projections 2.. Pivoted t0 the latter at 3 are semi-cylindrical plugs or jaws 4 which, as best shown in Figs. 4 and 5, areclearly shown in Figs. 2, and 3, whereby all strain is removed from the'pivot pins 3.

These la ,9 4 are also cut awa as shown in V 7 Figs. 2 and 3, to permit a certain extent of movement of the arm 1 relatively to the plugs 4...

In operation, when a core lifter is to be inserted in the end of the core I), the arm 1 is moved to shift the blocks relatively to one another and bring them into the position shown in Fig. 2.5. When so positioned, the blocks are at a minimum distance from one another and will slip freely into the end of the tuhular core 7). Now, when the chains f attachedto the arms 1. are tightened, the latter are'moved inwardly toward one another, which expands the plugs 4 to grip the core .7). With one block l as a center, the other block is moved in an arc and forced away from the first block toggle fashion against the core 7). Thus, it will be evident that the greater the pull on the plugs or jaws a forced against the core. After the roll (:1, has been lifted and the chains f loosened, the arms 1 may be knocked outward]. from one another whereby the plugs n'iay e contracted and withdrawn from the core.

One of the more important advantages of the invention is the small amount of space necessary for safely gripping the load. In each device, the jaws 4.21m so pivoted thathe line joining the pivots 3 is never quiteperpendicular to the axis of the core (see Fig. 3). Thus, the heavierthe weight on the core the greater is the binding force of jaws t in the lifting operation. Thus, the invention provides a simple and ellicient litter which is quickly and conveniently applicable in crowded spaces to attach hoisting mechanism to a tubular core or like opnings.

' t is recognized that various modifications may he made in the single embodiment of the invention described Without departing from the scope of the invention which is,

v ing, in combination, two oppositely arranged segmental plugs, and .a link pivotally con' nectingithe latter havin an arm extending without the core for lifting purposes, said link arranged normally in inclined relation to the axes of said plugs, whereby the latter are drawn together to permit free insertion in the end of a core, sai'd arm arranged when moved to force said linktoward normal relation with the axes of said plugs, whereby the latter are expandedagainst the interior walls of said core to grip the same. with a toggle force.

3. A core lifter for hollow cores, comprising, in combination, split plug elements arranged to freely fit withinthe core, a link normally tilted with respect to said elements, and pivot ,pins connecting said link and elements, said link having a part extending without the core for lifting purposes, said link arranged when said partis lifted ,to move toward a normal position with relation to said plug elements and to separate and expand them against the walls of the core, said link formed with arc-shaped bearmg surfacesarranged to fit in corresponding surfaces formed in the plugs, whereby strain on the latter is transferred directly to the link without the intermediary of the pivot the load with a distributed pressure, and

means to connect said. levers, said means arranged to be lifted at a point intermediate said levers to simultaneously actuate the latter arid equally grip each end of the load.

5. A lifting device, comprising, two oppositely arranged'segmental plugs each having an arc-shaped interior recess, an operating lever provided at one end with a spacing and connecting portion for said plugs and movable with respect thereto, the ends of said spacing portion being provided with corresponding bearing surfaces for the walls of the arc-shaped recesses, all constructed and arranged so that the lever may move to space the plugs ,as desired and the force transmitted from the lever to the plugs may bind the latter against the interior surfaces of a load to be lifted.

6. A lifting device, comprising, a bent lever having one arm adapted to be inserted in an opening in the load to be lifted and another arm adapted to extend outside the load for lifting purposes, and jaws separately pivoted to said first named arm and arranged to be separated from one another by a direct lever action to grip the interior walls of said opening with a toggle action when the last-named arm is lifted.

SAMUEL E. COW LES. 

